<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <meta http-equiv="X-UA-Compatible" content="ie=edge">
    <title>Document</title>
    <style>
    .pasent{
        width: 200px;
        background: #000;

    }
    .child{
        width: 100px;
        height: 100px;
        background: orange;
        float: left;
    }
    .two{
        width: 300px;
        height: 300px;
        background:pink;
    }
    .pasent::after{
        display: table;
        content: "";
        clear: both;
    }
    </style>
</head>
<body>
    <div class="pasent">
        <div class="child">

        </div>
    </div>
    <div class="two">

    </div>
</body>
</html>